Not include ProcessingInstruction, please

I am using the Delphi code below to save my IXMLDOMDocument2 to a file, I am using this because it makes it human readable.

However, I do not require the ProcessingInstruction. I am not creating one in the document so I'm thinking this code is somehow putting it in there. Any thoughts??

procedure SaveXML(AXML: IXMLDOMDocument2; APath: String);
var
  wrt: MXXMLWriter40;
  sax: SAXXMLReader40;
  memoutput: TMemoryStream;
begin
  wrt := CoMXXMLWriter40.Create;
  sax := CoSAXXMLReader40.Create;
  sax.contentHandler := (wrt as IVBSAXContentHandler) ;
  sax.dtdHandler := (wrt as IVBSAXDTDHandler);
  sax.errorHandler := (wrt as IVBSAXErrorHandler);
  sax.putProperty('http://xml.org/sax/properties/declaration-handler', wrt);
  sax.putProperty('http://xml.org/sax/properties/lexical-handler', wrt);
  try
    wrt.indent := True;
    wrt.disableOutputEscaping := True;
    wrt.omitXMLDeclaration := False;
    memoutput := TMemoryStream.Create;
    try
      wrt.output := TStreamAdapter.Create(memoutput) as IStream;
      sax.parse(AXML);
      memoutput.Position := 0;
      memoutput.SaveToFile(APath);
    finally
      memoutput.Free;
    end;
  finally
    wrt := nil;
    sax := nil;
  end;
end;